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Renesas ISL88011IH544Z-T7A
- Part No.:
- ISL88011IH544Z-T7A
- Manufacturer:
- Renesas
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
ISL88011IH544Z-T7A.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:250
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Product details
Overview
ISL88011IH544Z-T7A from Intersil is a 5-lead SOT-23 voltage supervisor IC with fixed 4.38V VDD monitoring, adjustable Power-On Reset timeout via CPOR pin, complementary active-low (RST) and active-high (RST) reset outputs, and manual reset input (RST/MR). It delivers ±1.5% threshold accuracy over -40°C to +85°C and supports critical µP power sequencing in embedded control systems.
For engineers reviewing the ISL88011IH544Z-T7A datasheet, ISL88011IH544Z-T7A pinout, ISL88011IH544Z-T7A application, or ISL88011IH544Z-T7A equivalent, this page provides verified functional specifications, validated pin roles, confirmed dual-reset architecture, and real-world timing behavior for industrial-grade power monitoring design.
Technical Context
The ISL88011IH544Z-T7A implements a single-supply fixed-threshold supervision architecture with factory-programmed 4.38V VDD trip point (±1.5% over temperature), hysteresis of 44mV, and reset assertion valid down to VDD = 1V. Its POR timeout defaults to 200–250ms but is externally adjustable via capacitor on CPOR pin.
It integrates debounced manual reset (MR) functionality on the RST/MR pin, supports push-button or controller-driven reset initiation, and asserts both RST (open-drain) and RST (push-pull) simultaneously during fault or startup conditions - enabling flexible interface with µP reset inputs and system status indicators.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDD Threshold | 4.38V ±1.5% over -40°C to +85°C - ensures reliable detection of 4.5V nominal supply brownout before µP malfunction. |
| POR Timeout | 200–250ms (CPOR open); extended via external capacitor - guarantees stable power-up before µP execution begins. |
| Supply Current | 5.5–11.5µA (2.5–5.0V) - enables use in battery-powered equipment without significant standby drain. |
| Reset Outputs | Complementary RST (push-pull high) and RST (open-drain low) - supports direct connection to both µP nRESET and LED/status logic. |
| Manual Reset Input | RST/MR pin with <100mV threshold and 1µs minimum pulse - allows robust push-button or FPGA-controlled reset initiation. |
| Operating Range | VDD = 2.0–5.5V; temp = -40°C to +85°C - suitable for industrial embedded and portable electronics environments. |
| Reset Validity | Reset signal remains valid down to VDD = 1V - prevents spurious release during deep brownout recovery. |
Pinout & Package
Package: 5-lead Pb-free SOT-23 (JEDEC MO178AA / EIAJ SC-74), 2.80 × 1.60 × 1.10 mm body, 0.95 mm lead pitch, P5.064 drawing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RST/MR | Combined manual reset input / active-low reset output | Debounced active-low input (MR) and open-drain reset output (RST) share same pin - simplifies PCB routing for reset button and status feedback. |
| 2 - GND | Ground reference | Primary return path for internal comparators and reset drivers; must be low-impedance to ensure threshold accuracy. |
| 3 - RST | Active-high push-pull reset output | Directly drives µP RESET pin or logic-high indicator without external pull-up; complements RST for dual-signaling capability. |
| 4 - VDD | Supply voltage and monitored input | Power source and primary supervision target; internally compared against 4.38V reference with 44mV hysteresis. |
| 5 - CPOR | Capacitive POR timeout delay input | Connects to external capacitor to extend default 200–250ms POR delay - enables precise timing alignment with slow-ramping supplies or FPGA configuration. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 4.38V VDD supervision | Factory-trimmed ±1.5% accuracy over full temperature range - eliminates need for external resistor dividers in 4.5V rail monitoring. |
| Complementary reset outputs | Simultaneous RST (push-pull) and RST (open-drain) - supports mixed-voltage µP interfaces and discrete status signaling without level shifters. |
| Adjustable POR timeout | Capacitor-programmable tPOR from 200ms to >2s - accommodates diverse power supply ramp rates and FPGA boot sequences. |
| Manual reset with debounce | RST/MR pin accepts sub-100mV logic-low pulses ≥1µs - rejects mechanical switch bounce and EMI transients. |
| Ultra-low quiescent current | 5.5µA typical at 2.5V - extends battery life in portable instrumentation and handheld devices. |
Applications
| Industrial Process Controller | Embedded µP Power Sequencing |
|---|---|
|
Use Scenario: Monitoring 4.5V auxiliary supply in PLC I/O module during cold start and brownout events. IC Role / Device Role / Timing Role: Voltage supervisor asserting reset until VDD ≥4.38V for ≥250ms, then holding µP in reset until firmware validates analog sensor rails. Use Value: Prevents erratic I/O state transitions during unstable power-up, ensuring deterministic hardware initialization per IEC 61131-2. |
Use Scenario: Coordinating power-on sequence between ARM Cortex-M4 core and external DDR memory in edge gateway. IC Role / Device Role / Timing Role: Generating synchronized RST and RST signals triggered by 4.38V main rail, with CPOR-tuned 1.2s delay matching DDR initialization time. Use Value: Eliminates need for discrete RC timing network and dual reset buffers, reducing BOM count and layout area by 3 components. |
| Portable Medical Instrument | Battery-Powered Data Logger |
|
Use Scenario: Supervising 4.2V Li-ion battery output in handheld ECG device during discharge below 3.6V. IC Role / Device Role / Timing Role: Detecting VDD drop below 4.38V threshold and asserting reset to halt ADC sampling and trigger low-battery shutdown routine. Use Value: Maintains safe operation down to 1V VDD, enabling graceful shutdown even during rapid battery sag under load. |
Use Scenario: Ensuring reliable startup of MSP430-based logger after coin-cell replacement or deep discharge recovery. IC Role / Device Role / Timing Role: Providing 200ms POR delay and manual reset via tactile switch on RST/MR pin for field recalibration. Use Value: 5.5µA supply current extends 10-year shelf life; integrated MR debounce removes need for external Schmitt trigger. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL88011IH546Z-T7A | Fixed 4.64V VDD threshold (vs. 4.38V); identical pinout, timing, and features | Targets 4.75V nominal supplies instead of 4.5V; requires validation of margin against actual rail tolerance | Select when supervising 4.75V ±5% rails where 4.64V trip provides tighter safety margin than 4.38V. |
| MAX6326UT438T | 4.38V fixed threshold, 3-pin SOT-23, no RST output or CPOR adjustability | Lacks active-high reset and programmable POR - limits interface flexibility and timing tuning capability | Choose only if board space is constrained to 3-pin footprint and dual-reset signaling is unnecessary. |
Compared with ISL88011IH544Z-T7A, ISL88011IH546Z-T7A offers higher trip voltage for tighter 4.75V rail supervision but identical functionality, while MAX6326UT438T sacrifices RST output and CPOR adjustability to reduce package size - making it suitable only for minimalistic, space-critical designs without timing customization needs.
Availability
ISL88011IH544Z-T7A is available at Aetrix Electronics and suitable for industrial process controllers, embedded µP power sequencing, and portable medical instrumentation requiring stable component supply across long-lifecycle programs.
Supply support for ISL88011IH544Z-T7A includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Intersil Corporation is a precision analog and power management semiconductor provider, now part of Renesas Electronics, delivering high-reliability solutions for industrial, infrastructure, and embedded markets.
The ISL88011 family was designed specifically for low-power, high-accuracy voltage supervision in space-constrained embedded systems - emphasizing ±1.5% threshold stability, dual-reset signaling, and capacitor-adjustable POR timing.
FAQ
What is the exact VDD threshold voltage of the ISL88011IH544Z-T7A?
The ISL88011IH544Z-T7A has a factory-programmed VDD threshold of 4.38V, specified with ±1.5% accuracy over the full -40°C to +85°C operating temperature range. This value is confirmed in the Ordering Information table (page 3) and Electrical Specifications (page 6) of FN8093 Rev 5.00, and applies exclusively to the ISL88011IH544Z-T7A variant - not to other members of the ISL88011 family.
Does the ISL88011IH544Z-T7A support watchdog timer functionality?
No, the ISL88011IH544Z-T7A does not include watchdog timer capability. Watchdog functionality is exclusive to the ISL88013 and ISL88015 variants per the Product Features Table (page 5) and Functional Block Diagrams (page 4). The ISL88011IH544Z-T7A provides only voltage supervision, adjustable POR, and manual reset - confirmed by absence of WDI pin and watchdog-related electrical specs in its datasheet sections.
How is the Power-On Reset timeout adjusted on the ISL88011IH544Z-T7A?
The ISL88011IH544Z-T7A uses the CPOR pin (pin 5) to adjust POR timeout: connecting an external capacitor between CPOR and GND extends the default 200–250ms delay. For example, a 30pF capacitor increases tPOR to ~2.5s (Figure 3, page 9). This adjustment is validated for ISL88011 and ISL88014 only - not applicable to ISL88012/ISL88013/ISL88015, which have fixed tPOR.
What are the reset output types provided by the ISL88011IH544Z-T7A?
The ISL88011IH544Z-T7A provides two complementary reset outputs: RST (pin 3) is a push-pull active-high output capable of sourcing 0.4mA, while RST/MR (pin 1) serves as an open-drain active-low output. Both assert simultaneously during power-up, brownout, or manual reset - enabling direct interfacing with µP nRESET pins and logic-level status indicators without external components.
Is the ISL88011IH544Z-T7A RoHS compliant and Pb-free?
Yes, the ISL88011IH544Z-T7A is Pb-free and RoHS compliant, as explicitly stated in the Ordering Information table (page 3) and Features list (page 1). It uses 100% matte tin plate (e3 termination finish) and meets IPC/JEDEC J-STD-020 reflow requirements for lead-free assembly - confirmed in Notes 1 and 4 of the datasheet.
ISL88011IH544Z-T7A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.38V
- Output:
- Open Drain, Push-Pull
- Reset:
- Active High/Active Low
- Reset Timeout:
- 200ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 5-SOT
ISL88011IH544Z-T7A FAQ
1.How can I place an order for ISL88011IH544Z-T7A through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL88011IH544Z-T7A on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ISL88011IH544Z-T7A reliable?
The price and inventory of ISL88011IH544Z-T7A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL88011IH544Z-T7A is usually 5 days.
3.What payment methods are accepted for ISL88011IH544Z-T7A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL88011IH544Z-T7A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL88011IH544Z-T7A?
ISL88011IH544Z-T7A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL88011IH544Z-T7A order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ISL88011IH544Z-T7A?
For technical support, including ISL88011IH544Z-T7A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL88011IH544Z-T7A requirements.
6.How does Aetrix verify that ISL88011IH544Z-T7A is sourced from the original manufacturer or authorized distributors?
All ISL88011IH544Z-T7A products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ISL88011IH544Z-T7A meets industry standards.
7.What is the process for return or replacement of ISL88011IH544Z-T7A?
All ISL88011IH544Z-T7A units undergo pre-shipment inspection (PSI). If there is an issue with ISL88011IH544Z-T7A, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ISL88011IH544Z-T7A part is unused and in its original packaging.
Return procedure for ISL88011IH544Z-T7A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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